ECHO CANCELER DEVICE,申请号JP19900292920-传众专利搜索

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发明名称	ECHO CANCELER DEVICE
摘要
申请公布号	JPH04165825(A)	申请公布日期	1992.06.11
申请号	JP19900292920	申请日期	1990.10.30
申请人	NEC ENG LTD	发明人	MORIIDE HIROYUKI
分类号	H04B3/23	主分类号	H04B3/23
代理机构		代理人
主权项
地址

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